Members of Syrian civil defence forces evacuate a victim of an air strike in the rebel-held enclave of Arbin in the Eastern Ghouta near the capital Damascus on Feb. 9, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrians youth runs following an air strike in the rebel-held enclave of Arbin in the Eastern Ghouta near Damascus on Feb. 8, 2018. (Photo: Amer Almohibany/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Smoke plumes rise following a reported regime air strike in the rebel-held enclave of Jisreen in the Eastern Ghouta near Damascus, Syria on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian man reacts following an air strike in the rebel-held enclave of Arbin in the Eastern Ghouta near Damascus on Feb. 8, 2018. (Photo: Amer Almohibany/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

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Syrian government airstrikes kill dozens in Eastern Ghouta

An injured Syrian is helped out of the rubble following a reported regime air strike in the rebel-held enclave of Arbin in the Eastern Ghouta near Damascus on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian baby waits to receive treatment in a makeshift clinic following air strikes in the rebel-held enclave of Arbin in the Eastern Ghouta near Damascus on Feb. 8, 2018. (Photo: Amer Almohibany/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Syrian children covered in dust walk out of a shop following reported Syrian air force strikes in the rebel-held town of Saqba, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian child receives treatment at a makeshift hospital following reported Syrian air force strikes in the rebel-held town of Hamouria, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Syrian civil defence volunteers carry away an injured man after reported regime air strikes in the rebel-held town of Jisreen, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus, on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Relative of a Syrian child, who lost his life after Assad Regime carried out airstrikes over Arbin town of the Eastern Ghouta region of Damascus which is a de-escalation zone in Syria on Feb. 08, 2018. (Photo: Dia Al-Din/Anadolu Agency/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Syrian civilians flee from reported regime air strikes in the rebel-held town of Jisreen, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus, on Feb. 8, 2018. (Photo: Abdulmonam Eassa/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A wounded Syrian man receives medical treatment at a hospital after Assad Regime carried out airstrikes over Arbin town of the Eastern Ghouta region of Damascus which is a de-escalation zone in Syria on Feb. 8, 2018. (Photo: Dia Al-Din/Anadolu Agency/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Syrian civlians flee from reported regime air strikes in the rebel-held town of Jisreen, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus, on Feb. 8, 2018. (Photo: Abdulmonan Eassa/AFP/Getty Images)

A man holds a child after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian air force MiG-23 jet drops a payload during a reported regime air strike in the rebel-held town of Arbin, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus, Syria, Feb. 7, 2018. (Photo: Amer AlMohibany/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

Smoke plumes rise following a reported regime air strike in the rebel-held town of Arbin, in the besieged Eastern Ghouta region on the outskirts of the capital Damascus, Syria on Feb. 7, 2018. (Photo: Amer AlmohibanyAFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A member of the Syrian Civil Defence carries an injured child following regime air strikes on the rebel-held besieged town of Douma in the eastern Ghouta region, on the outskirts of the capital Damascus, on Feb. 7, 2018. (Photo: Hamza Al-Ajweh/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian man searches for people in a fire following regime air strikes on the rebel-held besieged town of Douma in the eastern Ghouta region, on the outskirts of the capital Damascus, on Feb. 7, 2018. (Photo: Hamza Al-Ajweh/AFP/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

An injured woman is carried on a stretcher after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)

A woman gestures as she walks on rubble of damaged buildings after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

A man holds a child after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

A general view of damaged houses after an air raid in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 6, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

A man reacts after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

Civilians and civil defense volunteers look for the remains of missing people stuck under the rubble for more than five hours, after a bombing by forces loyal to Syrian goverment, in Douma, eastern Ghouta, Syria, Feb. 6, 2018. (Photo: Mohammed Badra/EPA-EFE/REX/Shutterstock)

Syrian government airstrikes kill dozens in Eastern Ghouta

A wounded Syrian girl is being taken to a hospital after Assad Regime carried out airstrikes to Zemalka town of besieged Eastern Ghouta, which is a de-escalation zone in Damascus, Syria on Feb. 7, 2018. (Photo: Khaled Akasha/Anadolu Agency/Getty Images)

Syrian government airstrikes kill dozens in Eastern Ghouta

A Syrian Civil Defense group, known as the White Helmets, paramedic carries his wounded son fleeing from the scene of an attack after airstrikes hit a rebel-held suburb near Damascus, Syria, Tuesday, Feb. 6, 2018. (Photo: Syrian Civil Defense White Helmets via AP)

Syrian government airstrikes kill dozens in Eastern Ghouta

Men are seen passing by a burning building in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 6, 2018. (Photo: Bassam Khabieh/Reuters)

Syrian government airstrikes kill dozens in Eastern Ghouta

A man reacts as he is carried on a stretcher after an airstrike in the besieged town of Douma in eastern Ghouta in Damascus, Syria, Feb. 7, 2018. (Photo: Bassam Khabieh/Reuters)